Complete certain tasks to unlock the following.

Unlockable	How to unlock
7-10	Pick up 7-10 Split in Practice Mode.
Big Head Mode	Unlock All Other Unlockables.
Bones	Get a whole-in-one on Hole 13 in Golf Mode.
Cosmic Bowling Stage	Score a 180 or higher in Tournament.
Haunted Pirate Ship Stage	Get 4 Strikes in a row in Open Play or Tournament.
Mars Stage	Get 6 skins in a Skins Match on Difficult or Expert.
Newton	Close every frame in Open Play.
Night Beach Stage	Bowl 2 or more under par in Golf Mode.
Night Castle Stage	Win Tournament Once.
Night Chinese Bridge Stage	Get Hole In One On First Hole in Golf Mode.
Night Egyptian Stage	Complete 17 challenges in Challenge Mode.
Night Wild West Stage	Accumulate $100,000 in overall skins earnings.